390 HARPER: BOTANICAL CROSS-SECTION OF MISsSISSIPPI 
RUBS HERBS 
Sambucus canadens Cicuta Curtissii 
Cephal ae ocuidentals Saururus cernuus 
Brunnichia c rrhosa Juncus 
ndinari sisete cs ommelina hirtelia 
Hydrangea quercifolia Carex oe is? 
pst ordata Homalocenchrus oryzoides 
Rhus g Onoclea sensibilis 
ree catia arborescens Carex lupulina? 
Rosa carolina Spirodela polyrrhiza 
Itea virginica Panicum scoparium 
Teucrium s 
Diodia teres* 
Euphorbia corollata 
etc. 
Up on the hills north of Malmaison the vegetation is much like 
that of ordinary dry woods at moderate altitudes throughout the 
South, as the following list shows. 
TREES HERBS 
Pinus echinata Cracca virginiana 
ercus marylandica Pteridium aquilinum 
or orida Meibomia laevigata 
Quercus falcata Mei ia Michauxii 
Quercus stellata Koellia flexuosa 
Que ‘us Psoralea pedunculata 
Hicoria alba Ante 
Z nnaria plantaginifolia 
Quercus coccinea pears acrostichoides 
Mitchella repens 
HRUBS Dioscorea villosa 
Ceanothus americanus 
Hydrangea quercifolia 
Judging from the vegetation, the soil of these hills must be 
considerably less fertile than that of the same line of bluffs farther 
south, as described by Dr. Hilgard (who apparently never visited 
Carrollton and vicinity). Pinus echinata, the commonest tree, 
does not seem to have been reported from this part of Mississippi 
at all before. It seems never to grow on loess (according to Call, 
Geol. Surv. Arkansas 1889?: 184. 1891), or in any other very rich 
soil. This and several other species in the list can stand frequent 
forest fires, but Hydrangea and the three evergreen herbs and two 
vines grow mostly in ravines, where they are pretty well protected 
from fire. 
The *‘ Delta’ (PLATE 21). Next is the “‘ Yazoo delta”’ or Missis- 
sippi bottom. Many of its features can be matched fairly well in 
* On sand-bars along the creek between Carrollton and North Carrollton. This 
species grows in quite a variety of habitats, mostly unnatural, but they all have at 
least one character in common: exemption from fire 
